A new method of vehicle position measurement by use of laser beam tracking

摘要

This paper describes a new method of position measurement for a vehicle travelling in two-dimensional space using laser and optical detectors. If two points set on the vehicle and a reference point form an isosceles triangle, the vehicle position relative to the reference point can be calculated by a simple relation. Then we propose a system consisting of a laser beacon at the reference point and two photo-detectors set such that they are able to rotate on the vehicle. The bearing angles of the two detectors relative to the reference point can be measured by the laser beacon. The direction of the two photo-detectors is controlled so that the difference of the two bearing angles is maximum. In order to demonstrate the above method, an experimental system is made up and used for a vehicle position measurement. The results of the experiment show that the measurement system is effective for determining the position of the vehicle near the reference point.